I could see a Carved Rune if you're going for full non-wizard and/or non-Runesmith Waystone, but the Foundation will require a Light Wizard and the Runic Inductor a Runesmith anyway so may as well get a Dwarven Rune. And the Foundation runs into a bit of a political problem with the creation of Dhar.
But mostly I'm of the opinion that we don't really need to make a super cheap version of the Waystone. In terms of material cost the current one is pretty low already, and its not like the Network is only a few years from falling apart so we don't need it particularly fast. Make a leyline-only one with maybe a few tweaks that we can put in most places and that can be the standard one, while the current one if for the real nasty places.
So it could be:
[ ] [CAPSTONE] Collegiate Fascis- replaces High Mages with 8 different Wind enchanters, to ease up on that supply some
[ ] [RUNE] Dwarven- the best
[ ] [STORAGE] Reverse-engineered- difficulty and requirements will go down in time
[ ] [FOUNDATION] Grey Lord- only Wind based and the Lights seem to have understood this way better than the Grey Lords thought they would
[ ] [TRANSMISSION] Leyline
No High Magic required:
[ ] [CAPSTONE] Collegiate Fascis
[ ] [RUNE] Dwarven
[ ] [STORAGE] [Expensive] Runed
[ ] [FOUNDATION] Grey Lord
[ ] [TRANSMISSION] Leyline
Or if you if want it to simply be Wind based so that the Empire could make it on their own:
[ ] [CAPSTONE] Collegiate Fascis
[ ] [RUNE] Wizard
[ ] [STORAGE] [Expensive] Enchanted
[ ] [FOUNDATION] Grey Lord
[ ] [TRANSMISSION] Leyline